Girl name origins & meanings German : Feminine version of William; Will + helmetTeutonic : Fierce protector Girl name variations Wilhelmina Wiletta Wilette Wilhelmine Willa Willimina Wilma Wilhemine Wihelma Willette Wilmette Wyla Willie Willy Will Mina Minnie Minny Billie Billy Helma Vilma Guillelmine Guillemette Vilhelmina